add aws codebuild file

buildspec.yml

@@ -0,0 +1,17 @@
+version: 0.1
+phases:
+    install:
+        commands:
+            - ‘touch .npmignore’
+            - ‘npm install -g gatsby’
+    pre_build:
+        commands:
+            - ‘npm install’
+    build:
+        commands:
+            - ‘npm run build’
+artifacts:
+    base-directory: public
+    files:
+        - ‘**/*’
+    discard-paths: yes